package com.example.graduation.util;

import org.apache.http.HttpStatus;

import java.util.HashMap;
import java.util.Map;

/**
 * ProjectName graduation
 *
 * @author xieyucan
 * <br>CreateDate 2022/2/11 14:04
 */
public class R extends HashMap<String, Object> {

    /**
     * 无参构造函数，不过他为什么可以凭空直接使用put呢？
     * 也许他直接省略了this
     *
     * @return {@link null}
     * @author xieyucan
     * CreateDate 2022/2/11 14:24
     */
    public R() {
        put("code", HttpStatus.SC_OK);
        put("msg", "success");
    }


    /**
     * 继承HashMap，让他的返回类为R，从而实现链式调用
     *
     * @param key
     * @param value
     * @return {@link R}
     * @author xieyucan
     * CreateDate 2022/2/11 14:23
     */
    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }

    public static R ok() {
        return new R();
    }

    public static R ok(String msg) {
        R r = new R();
        r.put("msg", msg);
        return r;
    }

    public static R ok(Map<String, Object> map) {
        R r = new R();
        r.putAll(map);
        return r;
    }

    public static R error(int code, String msg) {
        R r = new R();
        r.put("code", code);
        r.put("msg", msg);
        return r;
    }

    public static R error(String msg) {
        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, msg);
    }

    public static R error() {
        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, "未知异常，请联系管理员");
    }


}
